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http://www.ubuntu.com/download/desktop

When I select 64 bit (for newer machines) and hit download, I get ubuntu-12.04.2-server-amd64.iso. Is this to be expected, or an error? I want to install 64b Ubuntu 12.04 LTS into a VM in a 64b Windows 7 machine. The processor is not an AMD so I wonder if I have the right version.

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amd64 isn't AMD-only, it's just the standard architecture name used to denote 64-bit architecture. –  Thomas W. Jul 18 '13 at 22:19
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2 Answers 2

it's called amd64 because AMD developed it. Intel developed the old x86 base. This is primarily divided so none of the companies can rule the market and limit it's usage.

the amd64 will work any any cpu that is 64-bit capable.

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that was quick -- thanks –  jcollum Jul 18 '13 at 21:58
    
@Jcollum well did a school project about the difference between 32-bit and 64-bit :) –  Alvar Jul 18 '13 at 22:42
    
Being pedantic here there are 64-bit processors that are not AMD/Intel compatible. But, if your PC could run 64-bit Windows you can use the amd64 image even if the processor is not amd. –  Warren Hill Jul 19 '13 at 9:30
    
@WarrenHill Yes not everything is supported by the X86_64 platform, but if you have hardware that isn't supported by that architecture then you you know so much about the subject so you can make the choice on your own. –  Alvar Jul 19 '13 at 10:26
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Standard computers run x86 architecture cpus, which can be divided into:

  1. X86-16, meaning 16bit,
  2. X86-32, meaning 32bit, which is often refered to as x86 or i386 or IA-32 (Intel Architecture 32bit)
  3. X86-64, meaning 64bit, which is often refered to as amd64

The reason that many people refer to X86-64 as amd64 is that AMD developed it, which personally I think is not a good enough reason to call it that, after all Intel developed IA64 (Itanium Architecture) and you don't see anyone calling it intel64.

Needless to say, that software designed for amd64 is not limited to amd brand cpus, it will run on any X86-64 cpu.

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well IA64 isn't used in that much. Mostly servers, most computers use the 32-bit x86 or the 64 bit x86-64 extension, developed by AMD. –  Alvar Jul 18 '13 at 23:28
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